Papers
1. Ryo Oda (2025). Does perception of relational mobility affect the evaluation of norm-deviant altruism? Letters on Evolutionary Behavioral Science, 16, 31-35.
2. Ryo Oda & Natsuki Hayashi (2025). Effect of the probability of reciprocity on affective and physiological responses to the suffering of others. Adaptive Human Behavior and Physiology, 11, 7. https://doi.org/10.1007/s40750-025-00260-x
3. Ryo Oda & Tensei Takana (2025). Measuring altruism with checked boxes. Evolutionary Behavioral Sciences, 19 (3), 280-289. https://doi.org/10.1037/ebs0000368
4. Ryo Oda & Natsuki Hayashi (2024). Deciding who is worthy of help: effect of the probability of reciprocity on individuals’ willingness to help others. Evolutionary Psychology, 22(2). https://doi.org/10.1177/14747049241254725
5. Ryo Oda (2023). Is the Knobe effect due to error management? A functional approach to the side-effect effect. Letters on Evolutionary Behavioral Science, 14, 37-42.
6. Ryo Oda, Shotaro Ono & Shuhei Wada (2023). Does illusion of control have a function to appeal to others? Letters on Evolutionary Behavioral Science, 14, 22-25.
7. 小田亮 (2022). 日本人の性格特性評価に自己高揚はみられるのか. パーソナリティ研究, 31, 100-101.
8. Ryo Oda (2022). Leaving public evidence is morally right: The case of organ donation in Japan. Letters on Evolutionary Behavioral Science, 13, 45-49.
9. Ryo Oda & Akiko Matsumoto-Oda (2022). HEXACO, Dark Triad and altruism in daily life. Personality and Individual Differences, 185, 111303.
10. Ryo Oda & Kazuki Sawada (2021). Do social relationships with those who witness moral transgression affect the sense of guilt? Evolutionary Psychology, 19(3). https://doi.org/10.1177/14747049211032576
11. Ryo Oda & Kai Hiraishi (2021). Checking boxes for making an apology: testing the valuable relationships hypothesis by a new method. Letters on Evolutionary Behavioral Science, 12, 7-11.
12. Ryo Oda, Tomomi Tainaka, Kosuke Morishima, Nobuho Kanematsu, Noriko Yamagata-Nakashima & Kai Hiraishi (2021). How to detect altruists: Experiments using a zero-acquaintance video presentation paradigm. Journal of Nonverbal Behavior, 45, 261-279.
13. Ryo Oda & Kanako Hayashi (2020). The ideal romantic partner morality. Letters on Evolutionary Behavioral Science, 11, 1-5.
14. Ryo Oda, Motoki Kato & Kai Hiraishi (2018). Effects of observed counterfactual on prosocial lying: A preliminary report. Letters on Evolutionary Behavioral Science, 9, 5-8.
15. Arnaud Tognetti, Noriko Yamagata-Nakashima, Charlotte Faurie & Ryo Oda (2018). Are non-verbal facial cues of altruism cross-culturally readable? Personality and Individual Differences, 127, 139-143.
16. Ryo Oda. (2017b). Does perceived vulnerability to disease predict life-history strategy in Japanese adults? Letters on Evolutionary Behavioral Science, 8, 36-39.
17. Ryo Oda (2017a). Effect of being conscious of others on moral condemnation. Letters on Evolutionary Behavioral Science, 8, 20-23.
18. Ryo Oda & Ryota Ichihashi (2016). The watching eyes effect on charitable donation is boosted by fewer people in the vicinity. Letters on Evolutionary Behavioral Science, 7, 9-12.
19. Ryo Oda & Ryota Ichihashi (2016). Effects of eye images and norm cues on charitable donation: A field experiment in an izakaya. Evolutionary Psychology, 14, 1474704916668874.
20. Yasuo Ihara, Anthony D. Collins, Ryo Oda & Akiko Matsumoto-Oda (2016). Testing socially-mediated estrous synchrony or asynchrony in wild baboons. Behavioral Ecology and Sociobiology, 70(11), 1921-1930.
21. Ryo Oda & Kai Hiraishi (2015). Willingness to provide is more important than ability to provide: women’s choice of a long-term male partner. Letters on Evolutionary Behavioral Science, 6, 21-24.
22. Yasuyuki Fukukawa, Wataru Onoguchi & Ryo Oda (2015). Reciprocity as social capital and self-rated health in Japanese community-dwelling adults. GSTF Journal of Psychology (JPsych), 2, 28-33.
23. Ryo Oda, Yuta Kato & Kai Hiraishi (2015). The watching-eye effect on prosocial lying. Evolutionary Psychology, 13, 1474704915594959.
24. 小田亮、平石界 (2015). 日常的な利他性とパーソナリティ特性がホスピタリティに及ぼす影響.パーソナリティ研究, 23, 193-196.
25. 福川康之、小田亮、宇佐美尋子、川人潤子 (2014). 感染脆弱意識（PVD）尺度日本語版の作成. 心理学研究, 85, 188-195.
26. Ryo Oda, Akari Okuda, Mia Takeda & Kai Hiraishi. (2014). Provision or good genes? Menstrual cycle shifts in women’s preferences for short-term and long-term mates’ altruistic behavior. Evolutionary Psychology, 12, 888-900.
27. Ryo Oda, Wataru Machii, Shinpei Takagi, Yuta Kato, Mia Takeda, Toko Kiyonari, Yasuyuki Fukukawa & Kai Hiraishi (2014). Personality and altruism in daily life. Personality and Individual Differences, 56, 206-209.
28. Ryo Oda, Akinori Shibata, Toko Kiyonari, Mia Takeda & Akiko Matsumoto-Oda (2013). Sexually dimorphic preference for altruism in the opposite-sex according to recipient. British Journal of Psychology, 104, 577-584.
29. Ryo Oda (2013). Refusal of killing a stranger to save five brothers: How are others’ judgments anticipated and favored in a moral dilemma situation? Letters on Evolutionary Behavioral Science, 4, 9-12.
30. 小田亮、大めぐみ、丹羽雄輝、五百部裕、清成透子、武田美亜、平石界 (2013). 対象別利他行動尺度の作成と妥当性・信頼性の検討. 心理学研究, 84, 28-36.
31. 中村敏健、平石界、小田亮、齋藤慈子、坂口菊恵、五百部裕、清成透子、武田美亜、長谷川寿一 (2012). マキャベリアニズム尺度日本語版の作成とその信頼性・妥当性の検討. パーソナリティ研究, 20, 3, 233-235.
32. Ryo Oda, Kai Hiraishi, Yasuyuki Fukukawa & Akiko Matsumoto-Oda (2011). Human prosociality in altruism niche. Journal of Evolutionary Psychology, 9, 283-293.
33. 小田亮、山内新作、永縄拓也、平石界、松本晶子 (2011). 利他性の進化認知科学的研究のための尺度の検討. 観光科学, 3, 23-33.
34. Yuki Niwa, Kai Hiraishi & Ryo Oda (2011). A mirror has no effect on giving in the dictator game. Letters on Evolutionary Behavioral Science, 2, 16-19.
35. Ryo Oda, Yuki Niwa, Atsushi Honma & Kai Hiraishi (2011). An eye-like painting enhances the expectation of a good reputation. Evolution and Human Behavior, 32, 166-171.
36. Takuya Naganawa, Shinsaku Yamauchi, Noriko Yamagata, Akiko Matsumoto-Oda & Ryo Oda (2010). Do altruists detect altruists easier than non-altruists? Letters on Evolutionary Behavioral Science, 1, 2-5.
37. Ryo Oda & Shun Nakajima (2010). Biased face recognition in the Faith Game. Evolution and Human Behavior, 31, 118-122.
38. Ryo Oda, Takuya Naganawa, Shinsaku Yamauchi, Noriko Yamagata & Akiko Matsumoto-Oda (2009). Altruists are trusted based on non-verbal cues. Biology Letters, 5, 752-754.
39. Alexandra Alvergne, Ryo Oda, Charlotte Faurie, Akiko Matsumoto-Oda, Valérie Durand & Michel Raymond (2009). Cross-cultural perceptions of facial resemblance between kin. Journal of Vision, 9, 1-10.
40. Ryo Oda, Noriko Yamagata, Yuki Yabiku & Akiko Matsumoto-Oda (2009). Altruism can be assessed correctly based on impression. Human Nature, 20, 331-341.
41. Ryo Oda, Kai Hiraishi & Akiko Matsumoto-Oda (2006). Does an altruist-detection cognitive mechanism function independently of a cheater-detection cognitive mechanism? Studies using Wason selection tasks. Evolution and Human Behavior, 27, 366-380.
42. Ryo Oda, Akiko Matsumoto-Oda & Osamu Kurashima (2005). Effects of belief in genetic relatedness on resemblance judgments by Japanese raters. Evolution and Human Behavior, 26, 441-450.
43. Akiko Matsumoto-Oda, Ryo Oda, Yukako Hayashi, Hiroshi Murakami, Norihiko Maeda, Kiyonori Kumazaki, Keiko Shimizu & Tetsuro Matsuzawa (2003). Vaginal Fatty Acids Produced by Chimpanzees during Menstrual Cycles. Folia Primatologica, 74, 75-79.
44. Ryo Oda (2003). Sex differences in choices of tradeoffs between success and health. Anthropological Science, 111, 225-229.
45. Ryo Oda, Akiko Matsumoto-Oda & Osamu Kurashima (2002). Facial resemblance of Japanese children to their parents. Journal of Ethology, 20, 81-85.
46. Ryo Oda (2002). Individual distinctiveness of the contact calls of ring-tailed lemur. Folia Primatologica, 72, 132-136.
47. Ryo Oda (2001). Sexually dimorphic mate preference in Japan: An analysis of lonely hearts advertisements. Human Nature, 12, 191-206.
48. Akiko Matsumoto-Oda & Ryo Oda (2001). Activity budgets of wild female chimpanzees in different reproductive states. Journal of Ethology, 19, 17-21.
49. 松本晶子、小田亮 (2001). チンパンジーは野生復帰できるか—タンザニア・ルボンド島国立公園の例. エコソフィア, 7, 77-86.
50. Naoki Koyama, Masayuki Nakamichi, Ryo Oda, Naomi Miyamoto, Shin'ichiro Ichino & Yukio Takahata (2001). A ten-year summary of reproductive parameters for ring-tailed lemurs at Berenty, Madagascar. Primates, 42, 1-14.
51. 小田亮 (2000). 日本人における配偶相手の好みにみられる性差：結婚相手募集広告の分析から. 日本研究, 22, 131-140.
52. 小田亮、松本晶子、田代靖子、五百部裕 (2000). 和歌山県における猿害とニホンザルの分布：目撃例報告からの群れ分布推定の試み. 霊長類研究, 16, 23-28.
53. 松本晶子、小田亮 (1999). 野生チンパンジーのメスの繁殖状態と活動時間配分の変化. 霊長類研究, 15, 171-177.
54. Ryo Oda (1999). Scent marking and contact call production in ring-tailed lemurs (Lemur catta). Folia Primatologica, 70, 121-124.
55. Akiko Matsumoto-Oda & Ryo Oda (1998). Changes in the activity budget of cycling female chimpanzees. American Journal of Primatology, 46, 157-166.
56. Ryo Oda (1998). The responses of Verreaux's sifakas to antipredator alarm calls given by sympatric ring-tailed lemurs. Folia Primatologica, 69, 357-360.
57. Ryo Oda (1997). Biased face recognition in the Prisoner's Dilemma game. Evolution and Human Behavior,18, 309-315.
58. Ryo Oda (1996). Predation on a chameleon by ringtailed lemur (Lemur catta) in the Berenty reserve, Madagascar. Folia Primatologica, 67, 40-43.
59. Ryo Oda & Nobuo Masataka (1996). Interspecific responses of ringtailed lemurs to playback of antipredator alarm calls given by Verreaux’s sifakas. Ethology, 102, 441-453.
60. Ryo Oda (1996). Effects of contextual and social variables on contact call production in free-ranging ringtailed lemurs (Lemur catta). International Journal of Primatology, 17, 191-205.
61. Ryo Oda & Nobuo Masataka (1995). Function of copulatory vocalizations in mate choice by females of Japanese macaques (Macaca fuscata). Folia Primatologica, 64, 132-139.
62. Ryo Oda & Nobuo Masataka (1992). Functional significance of female Japanese macaque copulatory calls. Folsia Primatologica, 58, 146-149.
Commentary
1. Ryo Oda (2017). Just My Imagination: beauty premium and the evolved mental model. Behavioral and Brain Sciences, 40, 32-33.
Opinion article
1. Ryo Oda (2021). Education as niche construction: toward an evolutionary science of education. Letters on Evolutionary Behavioral Science, 12, 24-27.
2. Ryo Oda (2019). Is the watching-eye effect a fluke?. Letters on Evolutionary Behavioral Science, 10, 4-6.